Do the locomotion in the deep!
Researchers at the Monterey Bay Aquarium Research Institute use remotely operated vehicles (ROVs) to observe deep-sea animal behaviors. This video shows highlights from high definition video recorded from the ROVs. Deep-sea organisms use a variety of ways to swim. Among them are fish that undulate tails, sea spiders that "stride" through the water with their legs, and feather stars that use arm strokes to propel themselves when they detach from the seafloor.